package chapter04.Example17;
class Animal {
    public void shout() {
        System.out.println("喵喵喵....");
    }
}
class Dog extends Animal {
    public void shout() {
        System.out.println("汪汪.....");
    }

    public void eat() {
        System.out.println("吃骨头.....");
    }
}
public class Example17 {
    public static void main(String[] args) {
        Animal a1 = new Dog();
        System.out.println("instanceof判断啊是否来自动物类"+(a1 instanceof Animal));
        System.out.println("instanceof判断啊是否来自狗类"+(a1 instanceof Dog));
 Animal a2 = new Animal();
 System.out.println("instanceof判断a2是否来自动物类"+(a2 instanceof Animal));
 System.out.println("instanceof判断a2是否来自狗类"+(a2 instanceof Dog));
    }
}

